Drainage bag structure with adjustable length

The utility model discloses a length-adjustable drainage bag structure, and provides a length-adjustable drainage bag structure which comprises an intubation tube head, a head outer intubation tube, an extension outer tube, an outer tail tube, a spiral inner tube and a drainage bag, the lower end of the spiral inner pipe penetrates through the outer tail pipe, the extending outer pipes and the head outer inserting pipe to be fixedly connected with the upper end of the inserting pipe head, the outer side face of the lower end of the spiral inner pipe is fixedly connected with the inner side wall of the head outer inserting pipe, the extending outer pipes are arranged between the head outer inserting pipe and the outer tail pipe, and the head outer inserting pipe is arranged on the lower end face of the first extending outer pipe below. The head outer intubation tube is in threaded connection with the lower end face of the lower first extension outer tube, the outer tail tube is arranged on the upper end face o